(NnEKLASSI^ESKIE ZADA^I UPRUGOSTI I PLASTI^NOSTI (B/s - (NmONAHOW(B, (Nw(B.(Nn(B.s ((NnOWOSIBIRSK (B:s (NiZD(B-(NWO iN(B-(NTA GIDRODINAMIKI so an sssr(B,s, 1981)
Keywords: (NpLASTI^NOSTXs; (NuPRUGOSTXs